Prostaglandin F2.ALPHA. changes induced by ovulatory stimuli in the pond loach, Misgurnus anguillicaudatus.

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  • OGATA Hiroshi
    The National Research Institute of Aqyaculture
  • NOMURA Tadasi
    Department of Fishery Science, Faculty of Agriculture, Tohoku University
  • HATA Mitsuo
    Department of Fishery Science, Faculty of Agriculture, Tohoku University

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Other Title
  • ドジョウの排卵刺激によるプロスタグランジン-F<sub>2α</sub>の変化
  • ドジョウの排卵刺激によるプロスタグランジンーF2αの変化〔英文〕
  • ドジョウ ノ ハイラン シゲキ ニヨル プロスタグランジン F2アルファ ノ

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Abstract

The concentrations of prostaglandin F2α in the ovarian tissues of the pond loach were measured by radioimmunoassay during the ovulatory process initiated by an intraperitoneal injection of human chorionic gonadotropin (HCG). The HCG treatment resulted in the rise of the prostaglandin F2α level of the tissues. But indomethacin, which is one of the blocking agents of prostaglandin biosynthesis, significantly depressed the increase of prostaglandin F2α. In the ovulatory process, although no changes of the levels were observed at 2 and 6h after the treatment, prostaglandin F2α increased about 3-fold at 12h and there was a very significant difference at 24h. It is possible to conclude from the results that endogenous prostaglandins are involved in the process of ovulation of the oviparous fish.

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